15 Oklahoma water districts with results read from their own annual water quality report or EPA testing, largest first.
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- Oklahoma City644,000 people · 15 results
- Tulsa413,000 people · 15 results
- Norman Utilities Authority100,939 people · 14 results
- Lawton92,757 people · 11 results
- Edmond Pwa79,408 people · 18 results
- Enid49,347 people · 15 results
- Bartlesville34,748 people · 8 results
- Sand Springs28,774 people · 8 results
- Duncan Public Utilities Authority23,000 people · 3 results
- Owasso23,000 people · 8 results
- Ada22,600 people · 11 results
- Sapulpa19,702 people · 9 results
- Bixby Public Works Authority18,750 people · 8 results
- Mcalester Pwa18,206 people · 5 results
- Jenks Pwa16,924 people · 9 results